Microsoft bought Yammer in June 2012 for its enterprise social networking capabilities. Apps like Teams have usurped Yammer's intended role.
This article explains how to set auto-reply for group mailboxes, specially those for team-enabled Microsoft 365 Groups
Use this PowerShell script to gain insights into a complex, mature conditional access environment.
Tens of millions of Apple devices connect to Exchange Online user mailboxes. The mail app profile on many devices still use basic authentication.